X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/34e4f738bcba58e6d8c4cabbb0b3232a65b42a9d..67a452f7a9d69723741b064f08d70462bc8f00e7:/ec-exp.c

diff --git a/ec-exp.c b/ec-exp.c
index 26953e7..2c9a800 100644
--- a/ec-exp.c
+++ b/ec-exp.c
@@ -1,13 +1,13 @@
 /* -*-c-*-
  *
- * $Id: ec-exp.c,v 1.1 2004/04/01 12:50:09 mdw Exp $
+ * $Id$
  *
  * Point multiplication for elliptic curves
  *
  * (c) 2004 Straylight/Edgeware
  */
 
-/*----- Licensing notice --------------------------------------------------* 
+/*----- Licensing notice --------------------------------------------------*
  *
  * This file is part of Catacomb.
  *
@@ -15,30 +15,18 @@
  * it under the terms of the GNU Library General Public License as
  * published by the Free Software Foundation; either version 2 of the
  * License, or (at your option) any later version.
- * 
+ *
  * Catacomb is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU Library General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Library General Public
  * License along with Catacomb; if not, write to the Free
  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  * MA 02111-1307, USA.
  */
 
-/*----- Revision history --------------------------------------------------* 
- *
- * $Log: ec-exp.c,v $
- * Revision 1.1  2004/04/01 12:50:09  mdw
- * Add cyclic group abstraction, with test code.  Separate off exponentation
- * functions for better static linking.  Fix a buttload of bugs on the way.
- * Generally ensure that negative exponents do inversion correctly.  Add
- * table of standard prime-field subgroups.  (Binary field subgroups are
- * currently unimplemented but easy to add if anyone ever finds a good one.)
- *
- */
-
 /*----- Header files ------------------------------------------------------*/
 
 #include "ec.h"
@@ -69,10 +57,10 @@ ec *ec_imul(ec_curve *c, ec *d, const ec *p, mp *n)
     t.x->f |= MP_BURN;
   MP_SHRINK(n);
   EC_SETINF(d);
-  if (MP_LEN(n) == 0)
+  if (MP_ZEROP(n))
     ;
   else {
-    if (n->f & MP_NEG)
+    if (MP_NEGP(n))
       EC_NEG(c, &t, &t);
     if (MP_LEN(n) < EXP_THRESH)
       EXP_SIMPLE(*d, t, n);
@@ -112,7 +100,7 @@ static ec *immul(ec_curve *c, ec *d, ec_mulfactor *f, size_t n)
 
   for (i = 0; i < n; i++) {
     MP_SHRINK(f[i].exp);
-    if (f[i].exp->f & MP_NEG)
+    if (MP_NEGP(f[i].exp))
       EC_NEG(c, &f[i].base, &f[i].base);
     if (f[i].base.x && f[i].exp->f & MP_BURN)
       f[i].base.x->f |= MP_BURN;